TLV431BQDBZR Voltage References Lo-Vtg Adj Precision Shunt
Regulator PMIC Power Management ICs
1 Features
1• Low-Voltage Operation, VREF = 1.24 V
• Adjustable Output Voltage, VO = VREF to 6 V
• Reference Voltage Tolerances at 25°C
– 0.5% for TLV431B
– 1% for TLV431A
– 1.5% for TLV431
• Typical Temperature Drift
– 4 mV (0°C to 70°C)
– 6 mV (–40°C to 85°C)
– 11 mV (–40°C to 125°C)
• Low Operational Cathode Current, 80 µA Typical
• 0.25-Ω Typical Output Impedance • Ultra-Small SC-70 Package
Offers 40% Smaller Footprint Than SOT-23-3
• See TLVH431 and TLVH432 for:
– Wider VKA (1.24 V to 18 V) and IK (80 mA)
– Additional SOT-89 Package
– Multiple Pinouts for SOT-23-3 and SOT-89 Packages
• On Products Compliant to MIL-PRF-38535, All Parameters Are Tested
Unless Otherwise Noted. On All Other Products, Production
Processing Does Not Necessarily Include Testing of All Parameters.
2 Applications
• Adjustable Voltage and Current Referencing
• Secondary Side Regulation in Flyback SMPSs
• Zener Replacement
• Voltage Monitoring
• Comparator With Integrated Reference
3 Description
The TLV431 device is a low-voltage 3-terminal adjustable voltage
reference with specified thermal stability over applicable
industrial and commercial temperature ranges. Output voltage can be
set to any value between VREF (1.24 V) and 6 V with two external
resistors (see the Parameter Measurement Information section).
These devices operate from a lower voltage (1.24 V) than the widely
used TL431 and TL1431 shunt-regulator references.
When used with an optocoupler, the TLV431 device is an ideal
voltage reference in isolated feedback circuits for 3-V to 3.3-V
switching-mode power supplies. These devices have a typical output
impedance of 0.25 Ω. Active output circuitry provides a very sharp
turnon characteristic, making them excellent replacements for
low-voltage Zener diodes in many applications, including on-board
regulation and adjustable power supplies.
